Insulator



F. M. AMOS.

INSULATOR.

APPLICATION FILED MAY7, 1919.

1,335,634. Patented Mar. 30, 1920 LET-ED STATE ornrcn.

FRANK M. A vros, or wnnnnme, Wnsr VIRGINIA, ssrsnor. TO wrrnnmne TILE co rAnY, or wnnnnms, wns'r VIRGINIA, A. conronerronor wnsr VIE,-

GINIA.

INSULATOR.

To all whom it may concern:

Be itiknown that I, FRANK M. AMos, a.

citizen of the United States, residing'at lVheeling, in the county of Ohio and State.

' of which the following. is a specification.

This invention pertains to insulatorsand relates more particularly tothat. type wherein. a base and cap piece are employed. to hold and-clamp one or more wires between them when the parts or elements are.

in juxtaposition, and secured together and in place by a screw ornail.

The main object of the invention is to produce. an insulator. which by reason of its shape is easy of manufacture, there being an absence of any number of ribs, flanges and the like which are common in many insulators now in use and also depicted in the patented art.

A. further object of the invention resides in so constructing the members of the insulator that the wire will be automatically forced into the groove in the base element should the wire not be placed in direct aline ment therewith.

A still further object is to so construct the groove that slack in the wire will be taken up as the cap piece is secured in position, whereby saggy wires are avoided. Again the construction is such that the wire is held absolutely tight without the employment of sharp ridges such as are commonly employed to bite into the wire or the insulation thereon.

The structure is illustrated in the annexed drawings, wherein,-

Figure 1 is a longitudinal sectional view of the insulator secured in place with an insulated wire shown in clamped position.

F ig. 2 a transverse sectional view on the line IIII of Fig. 1;

Fig. 3 a longitudinal sectional view of the base of the insulator, the section being at right angles to that shown in Fig. 1; and

Fig. 4 a perspective View of the insulator and a securing nail, the insulator elements being separated.

In the drawing 1 denotes the base or body which is preferably cylindrical in cross sec tion and hollowed out as at 2 forming a circular bearing rim or ridge 3. The upper face of the body or base is formed with a centrally disposed teat or projection l,

Specification of Letters Patent, Patented 31 30 192{) Application filed. May 7, 1919. Serial No. 295,301.

4;. T he .outer face ofeach flange is formed as a continuation ofthe wall of the base .1 and the upperedge onface, of each flange is rounded or. curved whilethe inner wall of each flange is inclined inwardly to its base or its line of mergence with theupper orouterend of the base 1.. As will be noted, 7

each end of each flange is rounded as at 7, such curvature passing into the outwardly and downwardly curved faces 8 formed on the head of the base between the adjacent ends of the flanges. lhe construction, as above outlined, forms, in effect, two curved grooves 9 and 10 defined respectively by 'the inner. faces of the flanges 5 and 6 and the centrally disposed lug or teat 4, the

grooves merging into each other at each.

end and terminating in a common mouth or outlet, the lower portion of each of which is formed respectively by the curved face 8.

The upper edge of the flanges and the up per end of the teat or lug all lie in a con1- inon plane, see Figs. 1 and 2, and overlying these is a cap or wire-retaining piece 11. Said cap is made smooth on its under face and when a wire, as 12, is positioned in one of the grooves (9 or 10) it bears thereon and presses the same firmly in place. The cap is centrally perforated and like positioned bore 13 is formed in the base for the reception of a nail 14:, or other suitable fastening device. A slightly yielding or compressible washer 15 may be placed beneath the head of the nail to prevent breakage of the cap when the nail is driven home.

The wire when positioned prior to the forcing of the cap to its clamping position will preferably be extended straight across the base or knob l, as indicated in dotted lines in Fig. 2, and, as the cap is forced to place it will press the wire down into the underlying groove or channel and by reason of the inclined face of the teat l and the inclined and rounded ends of the flange, the wire will be bowed laterally and at the same time forced down into the channel 9 or 10,

as the case may be. This lateral bowing of the wire not only prevents endwise slipping of the wire through the insulator but also tends to a greater or less extent to take up the slack in the wire, thus insuring lack of drooping or sagging of the wire between adjacent insulators. The positioning and clamping of the wire may be readily effected, and, as will be noted, there are no sharp ridges or ribs employed which cut into the insulation of the wire.

What is claimed is 1. An insulator, comprising in combina tion, a body and a cap piece provided with alining bores, the body at its outer end being provided with a centrally disposed teat having its walls inclining outwardly toward its base and likewise proviced with two oppositely disposed arcuate flanges, which flanges terminate short of each other forming oppositely disposed mouths into which merge V wlre receiving channels formed between the respective flanges and the teat, the upper edge of the flanges and the upper end of the teat lying in a common plane, and said cap piece belng formed with an under face which contacts said flanges and teat and contacts the wire in the underlying channel.

2. An insulator comprising in combination, a base, said base having extending upwardly therefrom a centrally disposed teat frusto-conical in form with the smaller end outermost, and a pair of arcuate shaped diametrically disposed flanges extending upwardly from the base at the marginal portion thereof, said flanges being rounded at their upper edge, and having their ends downwardly curved and merging into a downwardly curved face formed on the base between the ends of each pair of flanges; and a cap piece having a flat under face adapted to contact said teat and the flanges, when said cap is forced into clamping contact with a wire placed within one of the channels formed between the teat and the flanges, the base and cap being provided with alining bores for the reception of a fastening device.

In testimony whereof I have signed my 7 name to this specification.

FRANK M. AMOS. 

